>>15591229>Eldrad foresaw that the Tau will inherit the galaxy from the imperium and accomplish greater deeds than the eldar.
No, no, no. No he did not. Here is the exact quote.
"I have followed the myriad potential futures of the Tau with great interest. Though barely even striplings compared to us, I feel a strange protectiveness towards them. In time I believe they will exceed even our greatest feats and master the darkness within their souls."
Eldrad says he supects the Tau will achieve greater things than the Eldar ever did, and 'master the darkness within their souls', whatever that means - possibly transcending the rampant violence that was halted with the arrival of the Ethereals. No more, no less. He doesn't say the Tau will take over the galaxy, he doesn't say they'll defeat the Imperium of Man. It isn't even a genuine prophesy of the future that he's trying to bring into being; it's his suspicious as to what may happen. That's all.